The product of the determinant of a square matrix by ignoring the entries in the row and column of a specific entry and the negative one raised to the power of sum of the number of row and the number of column of that entry, is called the cofactor of an entry.

The cofactor of an entry is a quantity and it is obtained by the product of the following two factors.

- The word “Lower” means situated below another part.
- The word “Triangular” means shaped like a triangle.

Learn how to find the cofactors of all entries in a two by two square matrix.

Learn how to evaluate the cofactors of all elements in a three by three square matrix.

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